117764813 has 2 divisors, whose sum is σ = 117764814. Its totient is φ = 117764812.

The previous prime is 117764771. The next prime is 117764819. The reversal of 117764813 is 318467711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95316169 + 22448644 = 9763^2 + 4738^2 .

It is an emirp because it is prime and its reverse (318467711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117764813 - 2²⁶ = 50655949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117764819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58882406 + 58882407.

It is an arithmetic number, because the mean of its divisors is an integer number (58882407).

Almost surely, 2^117764813 is an apocalyptic number.

It is an amenable number.

117764813 is a deficient number, since it is larger than the sum of its proper divisors (1).

117764813 is an equidigital number, since it uses as much as digits as its factorization.

117764813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 117764813 is about 10851.9497326517. The cubic root of 117764813 is about 490.1607316658.

The spelling of 117764813 in words is "one hundred seventeen million, seven hundred sixty-four thousand, eight hundred thirteen".